Year	% net
1999	97.14253
2000	99.02572
2001	99.53564
2002	99.61155
2003	99.65913
2004	99.91164
2005	99.77489
2006	99.74114
2007	99.38521
2008	98.6916
2009	98.56833
2010	98.33685
2011	98.45622
2012	98.49454
2013	98.61948
2014	98.74113
2015	98.99156
2016	98.58078
2017	98.63822